Cleaning-door for furnaces.



140,714,792, Patented uw. 2,1902. v F. FIEBEGER.`

Y VcLEArllrvl. 000B FUBFURNACES.

(Applicaziou med June 28, 1902.\ pu Model.)

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FRANK FIEBEGER,

ATENT FFICE.

OF AKRON, OHIO.

CLEANING-DOOR FOR FURNACES.

. SPECIFICATION forming part of Letters Patent No. 714,792. dated December 2, i190 Application ledJ'une 28.' 1902. Serial No. 113,570. (No model.)

To all whom it may concern:

Be it known that I, FRANK FIEBEGER, a citizen of the United States, residing at Akron,

in the county of Summit and State of Ohio,

provements in heating-furnaces, in Which the effect is secured by causing a current of atmospheric air to pass around va closedV fuelconsuming stove, thence to be distributed in a heated condition through a system of pipes to the places or apartments to be heated. In the use ofsuch furnaces it is often found necessary to reach the inner portion, which I have for the purpose of this application denominated the stove, to remove any accumulation of ashes or dirt that may have become deposited therein. In the effort to accomplish this end tubular openings have been secured to the upper or other part of the stove extending through and secured'to the outer casingand closed with `suitable doors. An objection has been found to this method of construction from the fact that as the upper part of thestove rises, due to the expansion of the metal from increased heat, it raises with it the tubular portion of the cleansingdoor, which being rigidly secured to the casing lifts the ring of the latter through which it projects, thereby opening the joint between it and the next lower ring of casing, and thus creates an annular Yopening' about the furnace, through which the dust-laden outer air enters, to be thence distributed through the register-pipes and registers to the apartments they are designed to heat.

The object of my invention is to overcome this objection by securing the tubular doorcasing by a joint that permits its rise and fall with the stove without disturbing the portion of the casing. y

To the accomplishment of the aforesaid object my invention consists in the peculiar and novel devices hereinafter described, and then specifically claimed, reference being had to the accompanying drawings, forming a part of this specification.

In the accompanying drawings, in which 'similar reference-numerals indicate like parts in the different gures, Figure l shows a portion of the outer casing provided with my improved cleaning-door; Fig. 2, a section ot' the same at the line X of Fig. l, and Fig. 3 a view of the outer tubular case with the door and frame removed.

Referring to the figures, l is the outer case of the furnace provided with a hinged door 2. This door 2 is hinged in a circular frame 3, the inner end of which fit-s 0n the end of the pipe 4, that in turn fits on a pipe 5, integral with and extending from the radiatingcylinder 6 of the stove.

The door-frame and outer end of the pipe 4 are curved to coincide with and fit the curve of the section of the outer case 1, against which they abut. The outer end of the pipe 4 has a flange 7, that enters the door-casing 3, and outside of this and concentric therewith a shoulder 8, caused by the recession of the pipe, which thence curves toward the stove end. The outer case l has a suitable opening to loosely receive the pipe 4 at the shoulder 8. In applying the door the pipe 4 is placed on the pipe 5 with its outer end eX- tending through the opening in the easel. Openings for screws in the doorcasing and corresponding screwthreaded openings in the end of the pipe 4 having been made corresponding slotted openings 10 are made in the case l and the frame 3 secured to the end of the. pipe 4 by screws 9. It follows that as the pipe 4 rises with the increased heat it carriesthe frame 3 and door with it, but does not raise the casing l, as the screws 9 slide in the slotted openings 10, and the 0bjection heretofore noted is avoided.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

In a heating-furnace of the kind named, the combination with a pipe extending from the radiating-cylinder a second pipe to connect therewith having at its outer end an annular flange and an outer annular shoulder, a door-frame arranged to receive said flange, a hinged door in said frame with corresponding screw-holes in the outer end of said second pipe and door-frame, of the outer case to surround the stove having an opening: ar-

ranged to loosely fit said annular shoulder,

- and slotted openings to register with said soreW-holesa.nd screws to unite said door- 5 frame and second pipe, substantially as shown and described.

In testimony that I claim the above I hereunto set my hand in the presence of two subscribing witnesses.

C. P. HUMPHREY, C. E. HUMPHREY. 

